Elderly Couple Reported Missing from Carnival Paradise

Update, 11 a.m., EST: Carnival has confirmed that Carnival Paradise departed at 7:10 p.m. on Friday for a three-day cruise to Ensenada.

(6 a.m. EST) -- An elderly couple reported missing from a cruise ship is being investigated by the FBI.

The Associated Press reported that a 90-year-old man and his 79-year-old wife had been aboard the 70,367-ton, 2,054-passenger Carnival Paradise when it left Long Beach, California, on Monday, but they could not be located when it returned to the port on Friday.

Carnival confirmed to Cruise Critic that their cabin door was double-locked from the inside, with a "Do Not Disturb" sign on it. Their belongings were in the cabin, and the balcony door was unlocked.

The couple were last seen on Tuesday evening, and a Carnival spokesperson reportedly told the Associated Press that they did not know if the pair disembarked in Catalina or Ensenada during the five-day Mexico cruise.

The FBI has been talking to passengers and crew and the Coast Guard has been conducting a search by plane.